I'm an RN, but have been out of work raising a family for the last 10 years. My last employment was as a telemetry nurse. I am looking to go back to work and would like to get ACLS certified. I've never taken it before, but have worked in telemetry. Do I need to be proficient in ECG interpretation prior to taking ACLS? I'm rusty to say the least. Is there anything else I need besides BLS, or would an ACLS course be way over my head?